[Java Doc] Update December 2025

[chernser]

Summary

• Adds migration section for JDBC driver

Checklist

• Delete items not relevant to your PR
• URL changes should add a redirect to the old URL via https://github.com/ClickHouse/clickhouse-docs/blob/main/docusaurus.config.js
• If adding a new integration page, also add an entry to the integrations list here: https://github.com/ClickHouse/clickhouse-docs/blob/main/docs/integrations/index.mdx

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
clickhouse-docs	Ready	Preview, Comment	Jan 28, 2026 6:14pm

3 Skipped Deployments

Project	Deployment	Review	Updated (UTC)
clickhouse-docs-jp	Ignored		Jan 28, 2026 6:14pm
clickhouse-docs-ru	Ignored	Preview	Jan 28, 2026 6:14pm
clickhouse-docs-zh	Ignored	Preview	Jan 28, 2026 6:14pm